What is a major problem facing megacities in less developed countries?

Ihave made a dive then stayed on the surface for a while. after this surface interval my pressure group is k. what is the maximum amount of bottom time available when doing a repetitive to 17/56 feet

In what way are innovations in technology and forms of goverment alike

If the human population continues to grow, what is a likely effect on land use? a. more land will be used for cities. b. more land will be used for forests. c. more land will be used for grasslands. d. more land will be used for wetlands.